package com.nowcoder.community.quartz;


import com.nowcoder.community.entity.DiscussPost;
import com.nowcoder.community.service.DiscussPostService;
import com.nowcoder.community.service.ElasticsearchService;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.RedisKeyUtil;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.BoundSetOperations;
import org.springframework.data.redis.core.RedisTemplate;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class PostScoreRefreshJob implements Job, CommunityConstant {
    private static final Logger logger= LoggerFactory.getLogger(PostScoreRefreshJob.class);
    @Autowired
    private RedisTemplate redisTemplate;
    @Autowired
    private DiscussPostService discussPostService;
    @Autowired
    private LikeService likeService;
    @Autowired
    private ElasticsearchService elasticsearchService;
    private static final Date epoch;
    static {
        try {
            epoch=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2014-08-01 00:00:00");
        } catch (ParseException e) {
            throw new RuntimeException("初始化牛客纪元失败!",e);
        }
    }

    @Override
    public void execute(JobExecutionContext context) throws JobExecutionException{
       String redisKey= RedisKeyUtil.getPostScoreKey();
        BoundSetOperations operations= redisTemplate.boundSetOps(redisKey);

        if(operations.size()==0){
            logger.info("任务取消，没有刷新的帖子!");
            return;
        }
        logger.info("[任务开始] 正在刷新帖子:"+operations.size());
        while(operations.size()>0){
            this.refresh((Integer) operations.pop());
        }
        logger.info("[任务结束] 帖子分数刷新完毕");
    }
    private void refresh(int postId){
        DiscussPost post= discussPostService.findDiscussPostById(postId);
        if(post==null){
            logger.error("该帖子不存在: id=" +postId);
            return;
        }
        boolean wonderful=post.getStatus()==1;
        int commentCount=post.getCommentCount();
        long likeCount= likeService.findEntityLikeCount(ENTITY_TYPE_POST,postId);

        double w=(wonderful ? 75:0)+ commentCount*10 + likeCount*2;
        double score= Math.log10(Math.max(w,1))  + (post.getCreateTime().getTime()-epoch.getTime()) / (1000*3600*24);

        discussPostService.updateScore(postId,score);
        elasticsearchService.saveDiscussPost(post);
    }
}
